Hardwood Flooring Blog

Subject:  Seasonal Gaps and Moisture Control For Hardwood Flooring

December 12th, 2017

Gaps in Hardwood FlooringEven though hardwood has been cut, dried and milled into flooring, it is still a hydroscopic material and can accept and release moisture. When doing so, it can expand and contract. In extreme high or low moisture conditions, a floor can start to go through unsightly and unexpected changes and in worst cases, cause irreparable damage.

The Forest Products Laboratory states that the comfort level of hardwood is at 60° – 80° and 30% - 50% relative humidity. These levels have been adopted by the National Wood Flooring Association and most flooring manufacturers as the levels at which hardwood flooring products will perform best. With this understanding of where wood performs best; manufacturers have set their warranty programs to mirror these levels.

When hardwood flooring is exposed to extreme conditions, either high or low, it will start to expand (when wet) or shrink (when dry). At this point, the floor may start to show evidence of these extreme conditions. Keeping your floors outside of the above mentioned parameters for an extended amount of time may cause irreparable damage. In many cases, exposing wood flooring to levels outside of this zone will void the manufacture’s warranty.

Here are a few things that can be done to help maintain the correct conditions in a home for optimal hardwood flooring performance:

  • Have a way to monitor temperature and humidity in the home.
  • If the HVAC thermostat does not have the ability to read humidity, inexpensive tabletop units can be purchased at most big box stores.
  • If the levels start to go outside the zone; use a humidifier or dehumidifier to control the moisture levels.
  • Standard heating and air conditioning systems may not be effective at controlling humidity levels. Additional humidity controlling devices may be necessary.
  • Make sure humidity control devices are maintained and always working properly.

Following these procedures and best practices can have lasting effects on your hardwood flooring.

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